Fingerprint identification apparatus

• US 10,275,630 B2
• Filed: 11/27/2018
• Issued: 04/30/2019
• Est. Priority Date: 12/11/2015
• Status: Active Grant

• Current Assignee: Gingy Technology Inc.
• Original Assignee: Gingy Technology Inc.
• Inventors: Chung, Chuck, Wu, Jen-Chieh
• Primary Examiner(s): Pervan, Michael
• Application Number:
  US16/200,656
• Publication Number:
  US 20190095677A1
• Time in Patent Office: 154 Days
• CPC Class Codes: G02B 27/30 Collimators
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06V 40/1318 using electro-optical elements or layers, e.g. electroluminescent sensing
• CPC Class Codes: G06V 40/1365 Matching; Classification

Abstract

A fingerprint identification apparatus including a light-transmitting device, an image-capture device disposed opposite to the light-transmitting device, and a collimator disposed between the light-transmitting device and the image-capture device is provided. The collimator includes a plurality of light-shielding layers and a plurality of light-transmitting layers that are alternately stacked. Each of the light-shielding layers has a plurality of openings respectively corresponding to a plurality of pixel regions of the image-capture device. Openings of the plurality of light-shielding layers corresponding to one pixel region are arranged along an oblique direction. The oblique direction and a normal direction of a pressing surface of the light-transmitting device have an included angle θ, and 0°<θ<90°.

Claims

1. A fingerprint identification apparatus, comprising:

a light-transmitting device having a pressing surface;

an image-capture device disposed opposite to the light-transmitting device and having a plurality of pixel regions; and

a collimator disposed between the light-transmitting device and the image-capture device, wherein the collimator has a plurality of first optical channels and a plurality of second optical channels, the first optical channels are extended in a first oblique direction, the first oblique direction and a normal direction of the pressing surface have an included angle θ

1, 0°

<

θ

1<

90°

, the second optical channels are extended in a second oblique direction, the second oblique direction and the normal direction of the pressing surface have an included angle θ

2, 0°

<

θ

2<

90°

, and the first oblique direction and the second oblique direction are staggered.

2. The fingerprint identification apparatus of claim 1, wherein a sensing light beam passes through the first optical channels to be transmitted toward a finger on the pressing surface;

and the sensing light beam from the pressing surface passes through the second optical channels to be transmitted to the pixel regions of the image-capture device.

3. The fingerprint identification apparatus of claim 1, wherein 35°

<

θ

1<

85°

.

4. The fingerprint identification apparatus of claim 1, wherein 35°

<

θ

2<

85°

.

5. The fingerprint identification apparatus of claim 1, wherein the included angle θ

1 and the included angle θ

2 are different.

6. The fingerprint identification apparatus of claim 1, wherein the image-capture device comprises:

a light-transmitting carrier having the pixel regions; and

a plurality of photoelectric conversion structures disposed in the pixel regions of the light-transmitting carrier.